Negative electrode for lithium ion battery, preparation method of negative electrode and lithium ion battery comprising negative electrode
A lithium-ion battery and negative electrode technology, which is applied to battery electrodes, non-aqueous electrolyte battery electrodes, secondary batteries, etc., can solve the problems of high price, increased electrolyte cost, positive electrode damage, etc., and achieves easy preparation and improved performance. and service life
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Example Embodiment
[0027] Example 1:
[0028] S1: add an appropriate amount of deionized water in the mixing tank a, then add 1.2wt% (weight percent of all dry powders) sodium carboxymethyl cellulose and 0.2wt% (weight percent of all dry powders) LiNO 3 , stir until fully dissolved and evenly mixed;
[0029] S2: Add 95.6wt% of artificial graphite active material and 1wt% of conductive carbon fiber and conductive carbon black to another mixing tank b, mix well, and then pour the solution in S1 into mixing tank b, continue to stir;
[0030] S3: adding 2.0 wt% styrene-butadiene rubber emulsion to the suspension prepared in S2, and stirring for 30 min to prepare a negative electrode slurry;
[0031] S4: uniformly coat the negative electrode slurry prepared in S4 on the surface of the copper current collector, and dry to obtain a negative electrode pole piece.
Example Embodiment
[0032] Example 2:
[0033] S1: add an appropriate amount of deionized water in the mixing tank a, then add 1.2wt% (weight percent of all dry powders) sodium carboxymethyl cellulose and 0.5wt% (weight percent of all dry powders) negative electrode composition Film additive, additive by weight 1:1:1LiNO 3 / Li 2 CO 3 / Li 2 O preparation, stir until fully dissolved and mixed evenly;
[0034] S2: add 95.3wt% of artificial graphite active material and 1wt% of conductive carbon black to another slurry mixing tank b, mix well, then pour the solution in S1 into slurry mixing tank b, and continue to stir;
[0035] S3: adding 2.0 wt% styrene-butadiene rubber emulsion to the suspension prepared in S2, and stirring for 30 min to prepare a negative electrode slurry;
[0036] S4: uniformly coat the negative electrode slurry prepared in S3 on the surface of the copper current collector, and dry to obtain a negative electrode pole piece.
Example Embodiment
[0037] Example 3:
[0038] S1: add an appropriate amount of deionized water in the mixing tank a, then add 1.2wt% (weight percent of all dry powder weight) sodium carboxymethylcellulose, stir until fully dissolved and mix well;
[0039] S2: 95.3wt% artificial graphite active material and 1wt% conductive carbon black, 0.5wt% LiNO 3 Add them to another slurry mixing tank b together, mix them evenly, then pour the solution in S1 into the slurry mixing tank b, and continue to stir;
[0040] S3: adding 2.0 wt% styrene-butadiene rubber emulsion to the suspension prepared in S2, and stirring for 30 min to prepare a negative electrode slurry;
[0041] S4: uniformly coat the negative electrode slurry prepared in S4 on the surface of the copper current collector, and dry to obtain a negative electrode pole piece.
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